TWIN-ROLL TYPE CONTINUOUS CASTING METHOD AND DEVICE

摘要

This invention provides a twin-roll continuous casting method, and an apparatus therefor, which can produce a thin sheet having excellent mechanical strength by finely and homogeneously reducing the crystal grain size, having reduced variance of materials and having excellent surface roughness devoid of skin roughness, and which can reduce the cost of equipment. A casting C obtained by solidification by using a pair of water cooling casting rolls 2a, 2b is subjected to temperature adjustment to a temperature zone in which an austenite structure exists in its matrix. Thereafter, the casting is rolled by an in-line rolling mill 5 at a temperature ranging from 850.degree.C to less than 1,350.degree.C after solidification and at a reduction ratio of 5 to 50%. In this way, overall variance of elongation of the steel material is kept within 5% in terms of the standard deviation.